pci-direct.h (740B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_PCI_DIRECT_H 3#define _ASM_X86_PCI_DIRECT_H 4 5#include <linux/types.h> 6 7/* Direct PCI access. This is used for PCI accesses in early boot before 8 the PCI subsystem works. */ 9 10extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset); 11extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset); 12extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset); 13extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val); 14extern void write_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset, u8 val); 15extern void write_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset, u16 val); 16 17extern int early_pci_allowed(void); 18#endif /* _ASM_X86_PCI_DIRECT_H */